CP3BT23 Datasheet, PDF (97/260 Pages) Texas Instruments – CP3BT23 Reprogrammable Connectivity Processor with Bluetooth and Dual CAN Interfaces

A CAN data frame consists of the following fields:
! Start of Frame (SOF)
! Arbitration Field + Extended Arbitration
! Control Field
! Data Field
! Cyclic Redundancy Check Field (CRC)
! Acknowledgment Field (ACK)
! End of Frame (EOF)
Remote Frame
Figure 36 shows the structure of a standard remote frame.
Figure 37 shows the structure of an extended remote frame.
STANDARD REMOTE FRAME (number of bits = 44)
Arbitration Field
11
Control Field
4
16
CRC Field
15
CRC
END OF
FRAME
d
IDENTIFIER
10 ... 0
Note:
d = dominant
r = recessive
ddd
DATA
LENGTH CODE
r rrrrrrrr
DS022
te ^{Figure 36. Standard Remote Frame}
EXTENDED REMOTE FRAME (number of bits = 64)
le ^{Arbitration Field}
11
18
Control Field
4
16
CRC Field
15
CRC
o ^d
rr
IDENTIFIER
28 ... 18
Note:
s ^{d = dominant}
r = recessive
IDENTIFIER
17 ... 0
r dd
DATA
LENGTH CODE
Figure 37. Extended Remote Frame
b A remote frame is comprised of the following fields, which is
the same as a data frame (see CAN Frame Fields on page
94) except for the data field, which is not present.
! Start of Frame (SOF)
! Arbitration Field + Extended Arbitration
O ^{! Control Field}
END OF
FRAME
r rrrrrrrr
DS023
! Cyclic Redundancy Check Field (CRC)
! Acknowledgment field (ACK)
! End of Frame (EOF)
Note that the DLC must have the same value as the corre-
sponding data frame to prevent contention on the bus. The
RTR bit is “recessive”.
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